Controllable Thrombectomy Net Expansion in Complex Blood Vessels
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Solution Overview
Problem
Existing mechanical thrombectomy devices face challenges with thrombectomy nets failing to expand smoothly in complex blood vessels, leading to incomplete thrombectomy or excessive vascular damage, and issues with thrombus retention during withdrawal.
Innovation Solution
A thrombectomy device with a thrombectomy net that features a radial contraction and expansion mechanism driven by action blocks, allowing controlled expansion and contraction, and a trapping system to ensure complete thrombectomy and safe withdrawal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct thrombectomy is used, then more thorough thrombectomy is achieved, but excessive damage to vascular walls occurs and various concurrent inflammations are caused
Solution Approach 1:
The patent introduces a thrombectomy net as an intermediary device between the operator and the thrombus. The net captures and extracts the thrombus without requiring direct contact between the operator's tools and the vascular wall, thereby achieving thorough thrombectomy while minimizing vascular wall damage and inflammation.
2Productivity
If thrombus fragmentation by laser is used, then thrombectomy can be achieved, but too low laser energy causes failure while too high energy damages blood vessels
Solution Approach 1:
The patent replaces the laser-based energy system with a mechanical thrombectomy net system. Instead of using laser energy that requires precise control to avoid vascular damage, the mechanical net provides a contactless method to capture and extract thrombus, eliminating the energy control dilemma entirely.
3Ease of operation
If a thrombectomy net with automatic expansion properties is used, then thrombectomy can be achieved, but in complex lesions with superhard thrombosis the net cannot expand smoothly, leading to device failure
Solution Approach 1:
The patent transitions from a static automatic expansion mechanism to a dynamic controlled expansion system. The thrombectomy net is equipped with a control mechanism that allows the operator to adjust and control the expansion process in real-time, enabling the net to adapt to complex lesion geometries and superhard thrombosis that would prevent smooth automatic expansion.
4Measurement precision
If the thrombectomy net is made to attach to the vascular wall for stable positioning, then positioning accuracy is improved, but vascular wall damage and inflammation are increased
Solution Approach 1:
The patent uses the thrombectomy net as an intermediary that provides stable positioning without requiring direct attachment to the vascular wall. The net can be positioned and stabilized through its structure and interaction with the thrombus itself, eliminating the need for vascular wall contact that would cause damage and inflammation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves effective thrombectomy by ensuring the thrombectomy net expands to engage the vessel wall, captures thrombi efficiently, and contracts for safe retrieval, improving thrombectomy success and reducing vascular damage.
Implementation Method 1
gradually expanding by means of an elastic force of the thrombectomy net to make the thrombectomy net attached to the vascular wall
Data Source
AI summary
Disclosed are a thrombectomy device and a thrombectomy system, where the thrombectomy device includes a thrombectomy net, a pushing tube, and a thrombectomy tube, where the thrombectomy tube is provided with a tube cavity, the thrombectomy net has a radial contraction state and a radial expansion state, and a proximal end of the thrombectomy net is fixedly connected to a distal end of the pushing tube. The thrombectomy device further includes an action tube provided with a first action block and a second action block. A distal end of the thrombectomy net is sleeved on the action tube and slides within a limited range of distance between the first action block and the second action block. When relative displacement against the pushing tube occurs, the thrombectomy net is driven to radially contract or expand. Therefore, the contraction and expansion of the thrombectomy net of the present disclosure are controllable.